Serious observers who want the best views of all types of celestial objects should add this comprehensive Filter Set to their arsenal. Includes a variable polarizing filter, four planetary filters (#80A medium blue, #25 red, #58 green, and #15 deep yellow), and a SkyGlow broadband light-pollution filter, plus a new hard case. Filters are optical glass with anodized aluminum cells; 1.25″ size. Save big on this mother of all filter sets!